CN107083228A - A kind of transparent non yellowing polyurethane sealant of one-component and preparation method thereof - Google Patents

A kind of transparent non yellowing polyurethane sealant of one-component and preparation method thereof Download PDF

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Publication number
CN107083228A
CN107083228A CN201710295537.9A CN201710295537A CN107083228A CN 107083228 A CN107083228 A CN 107083228A CN 201710295537 A CN201710295537 A CN 201710295537A CN 107083228 A CN107083228 A CN 107083228A
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non yellowing
component
transparent non
polyurethane sealant
sealant
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CN107083228B (en
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张毅
赵朝阳
齐文斌
董雨磊
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Shanghai He Cheng Polymer Science And Technology Ltd
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Shanghai He Cheng Polymer Science And Technology Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3225—Polyamines
    • C08G18/3234—Polyamines cycloaliphatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/50—Polyethers having heteroatoms other than oxygen
    • C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
    • C08G18/5024—Polyethers having heteroatoms other than oxygen having nitrogen containing primary and/or secondary amino groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
    • C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
    • C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
    • C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/02—Polyureas
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/12—Polyurethanes from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Material Composition (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The present invention relates to transparent non yellowing polyurethane sealant of a kind of one-component and preparation method thereof, by weight, component includes：Allophanate polyurethane prepolymer 50 75；Gas-phase silicon 5 15；Plasticizer 20 40；Latent curing agent 0.1 2；Catalyst 0.1 0.5.Prepare：Plasticizer, gas-phase silicon, latent curing agent will be added in allophanate polyurethane prepolymer, under vacuum dispersed with stirring 2h, and control temperature to be less than 50 DEG C；After the completion of stirring, catalyst, then dispersed with stirring 0.5h under vacuum are added, is produced.Fluid sealant of the present invention is one-component moisture-curable, with hardening time is short, transparency is high, VOC free volatile ingredient, is not likely to produce that bubble, adhesion strength are high, be adapted to adhering glass, transparent plastic；Also it can be used for lamp decoration, the bonding of light fixture and sealing.

Description

A kind of transparent non yellowing polyurethane sealant of one-component and preparation method thereof
Technical field
The invention belongs to polyurethane sealant and its preparation field, more particularly to a kind of transparent non yellowing polyurethane of one-component Fluid sealant and preparation method thereof.
Background technology
Polyurethane sealant has extensive application in auto industry, building, finishing, and current polyurethane sealant is according to component It is divided into one-component and two-component, being divided into polyurethane, modified polyurethane sealant according to composition, (usually silicone modified, epoxy changes Property, mercaptan modified etc.).Wherein One component Sealant is due to easy to use, and VOC free volatilization, binding material species is more, and elasticity is good, Shrinkage factor is low to be favored by market and workmen.
But common one-component polyurethane sealant is the shortcomings of have easy xanthochromia, poor transparency, Ye You producers are according to commonly There is hardening time length, easily hair again in the formula adjustment non yellowing isocyanates production polyurethane sealant of polyurethane sealant The shortcomings of bubble, adhesion strength are poor.
The invention using polyetheramine and small molecule chain extender collocation non yellowing isocyanates produce polyurethane sealant from Activity high polyetheramine and small molecule chain extender are introduced in side, curing rate had both been added and has also increased adhesion strength, while instead Allophanate should be generated has higher mechanical strength and wilfulness again, and product transparency and yellowing resistance can be also higher.
The invention is adapted to adhering glass, transparent plastic；Also it can be used for lamp decoration, the bonding of light fixture and sealing.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of transparent non yellowing polyurethane sealant of one-component and its system Preparation Method, the present invention is in order to improve the deficiency for the existing conventional seals glue mentioned in described above, and the present invention is more in isocyanates First alcohol polyamine and other surface side fillers carried out preferably with improvement, and there is provided a kind of one-component non yellowing polyurethane seal The synthetic method of glue.
A kind of transparent non yellowing polyurethane sealant of one-component of the present invention, by weight, component includes：
By weight, the allophanate polyurethane prepolymer raw material components include：
50-90 parts of Amino End Group PPOX ether；
10-50 parts of aliphatic diol or diamine mixture；
30-50 parts of isocyanates.
The allophanate polyurethane prepolymer is by non yellowing isocyanates and Amino End Group PPOX ether, fat One or more in race's glycol or diamines are polymerized.
The isocyanates be isocyanates be 4,4- methyl diphenylene diisocyanates, IPDI, Hexamethylene diisocyanate, two ring ethyl methane diisocyanate XDIs, cyclohexanedimethyleterephthalate One or more in diisocyanate, Methylcyclohexyl diisocyanate；Amino End Group PPOX ether is molecular weight Mn= 230~5000, degree of functionality is the one or more in 2 polyetheramine.
The aliphatic diol be ethylene glycol, propane diols, butanediol, pentanediol, neopentyl glycol, methyl propanediol, oneself two One or more in alcohol, diglycol, triethylene-glycol；Aliphatic diamine is hexamethylene diamine, isophorone One or more in diamines, trimethylhexane diamine, dimethyl diamino-dicyclohexyl methane.
The gas-phase silicon is aerosil；Plasticizer is diethyl phthalate, dibutyl phthalate, neighbour Dioctyl phthalate, dioctyl adipate, dibutyl adipate, hexamethylene 1,2- dioctyl phthalate diisononyl esters, benzoic acid two One or more in alcohol ester, triphenyl phosphate.
The latent curing agent is one kind in ALT-101, ALT-102, ALT-201, ALT-401, ALT-402, ALT-403 Or it is several；Catalyst is triethylenediamine, double (dimethylaminoethyl) ethers, dibutyl tin laurate, stannous octoate, different pungent One or more in sour zinc, isooctyl acid bismuth.
A kind of preparation method of the transparent non yellowing polyurethane sealant of one-component of the present invention, including：
(1) plasticizer, gas-phase silicon, latent curing agent will be added in allophanate polyurethane prepolymer, under vacuum Dispersed with stirring 2h, and control temperature to be less than 50 DEG C；
(2) after the completion of stirring, catalyst, then dispersed with stirring 0.5h under vacuum is added, one-component is produced transparent Non yellowing polyurethane sealant.
The preparation of the allophanate polyurethane prepolymer is specially：By Amino End Group PPOX ether, aliphatic two It is standby after alcohol or diamine mixture progress are well mixed, non yellowing isocyanates is weighed, is placed in reaction vessel, mixing is completed Polyetheramine and aliphatic diol or diamines be slowly dropped in non yellowing isocyanates, and continue stirring, inside is passed through N2Protect Shield, outside is cooled with frozen water, keeps internal reaction temperature to be not higher than 50 DEG C, continues 0.5~2h of stirring reaction after being added dropwise to complete, instead NCO content is tested after the completion of answering, allophanate prepolymer is produced after NCO content is qualified.
The qualified NCO content is that NCO content is 2-10%.
Beneficial effect
(1) present invention is in isocyanates, polyalcohol polyamine and other surface side fillers carried out preferably with improvement, and carry A kind of synthetic method of one-component non yellowing polyurethane sealant has been supplied, the deficiency of existing conventional seals glue is improved；
(2) fluid sealant of the invention is one-component moisture-curable, with hardening time is short, transparency is high, VOC free is evaporated into Divide, be not likely to produce bubble, adhesion strength height, be adapted to adhering glass, transparent plastic；Also it can be used for lamp decoration, the bonding of light fixture and close Envelope.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited Scope.
Embodiment 1
Take 581.2gHMDI to be placed in reaction vessel, be heated to after complete clear, be cooled to room temperature；
366.5g polyetheramines D230 is taken to be stirred after being mixed with diamino-dicyclohexyl methane (PACM)；
N is passed through into reaction vessel2, and reaction vessel is placed in frozen water, the D230 mixed and PACM is slowly dripped It is added in HMDI, and continuous vacuum is stirred；
Controlling reaction temperature is in 40-50 DEG C, after being added dropwise to complete, and is incubated 2h；
After the completion of insulation, NCO detections are carried out to product, it is 3% to measure actual NCO；
Polyureas carbamate prepolymer 650g should be completed and be placed in reaction vessel by negating；
Aerosil 100g, dimethyl glycol phthalate (DMEP) 250g are added into reaction vessel, Latent curing agent ALT-401 2g, start stirring under vacuum, control 40-50 DEG C of temperature；
Stir after 2h, catalyst triethylenediamine 0.2g is added into reaction vessel, 0.5h is again stirring for；
After the completion of stirring, that is, one-component non yellowing polyurethane sealant sample 1 is made.
Embodiment 2
Take 436.9gIPDI to be placed in reaction vessel, be heated to after complete clear, be cooled to room temperature；
242.7g polyetheramines D400 is taken to be stirred after being mixed with IPD (IPDA)；
N is passed through into reaction vessel2, and reaction vessel is placed in frozen water, the D400 mixed and IPDA is slowly dripped It is added in IPDI, and continuous vacuum is stirred；
Controlling reaction temperature is in 40-50 DEG C, after being added dropwise to complete, and is incubated 2h；
After the completion of insulation, NCO detections are carried out to product, it is 3.5% to measure actual NCO；
Polyureas carbamate prepolymer 550g should be completed and be placed in reaction vessel by negating；
Aerosil 100g, dimethyl glycol phthalate (DMEP) 350g are added into reaction vessel, Latent curing agent ALT-101 1g, start stirring under vacuum, control 40-50 DEG C of temperature；
Stir after 2h, catalyst triethylenediamine 0.5g is added into reaction vessel, 0.5h is again stirring for；
After the completion of stirring, that is, one-component non yellowing polyurethane sealant sample 2 is made.
Test result is as shown in the table：
Product type Sample 1 Sample 2
Product appearance Water white transparency Water white transparency
Surface drying time/min 12 10
Products appearance Water white transparency Water white transparency
Products appearance/90 day solar radiation Water white transparency Water white transparency
Article Stiffness Determination/Shao A 46 50
Tensile strength/Mpa 8.2 7.6
Tension elongation/% 623 597
Tearing strength/N/mm 32 36
Adhesive strength/Mpa 7.5 7.1
Partial test standard involved in the present invention is as follows：
The GB/T 12009.4-2016 plastic polyurethanes production part of aromatic isocyanate the 4th：Isocyano-content Determine
GB/T 528-2009 vulcanize the measure of rubber or thermoplastic elastomer tensile stress-strain performance
GB/T 529-2008 vulcanize the measure of rubber or thermoplastic elastomer tearing strength
GB/T 531-2008 vulcanize rubber or thermoplastic elastomer penetration hardness test method
GB/T 13936-1992 vulcanize rubber and metal adhesive tensile shear strength assay method

Claims (10)

1. a kind of transparent non yellowing polyurethane sealant of one-component, it is characterised in that：By weight, component includes：
2. the transparent non yellowing polyurethane sealant of a kind of one-component according to claim 1, it is characterised in that：By weight Number, the allophanate polyurethane prepolymer raw material components include：
50-90 parts of Amino End Group PPOX ether；
10-50 parts of aliphatic diol or diamine mixture；
30-50 parts of isocyanates.
3. the transparent non yellowing polyurethane sealant of a kind of one-component according to claim 1, it is characterised in that：The urea groups Formic acid esters polyurethane prepolymer is in non yellowing isocyanates and Amino End Group PPOX ether, aliphatic diol or diamines One or more are polymerized.
4. the transparent non yellowing polyurethane sealant of a kind of one-component according to claim 2, it is characterised in that：The isocyanide Acid esters is that isocyanates is 4,4- methyl diphenylene diisocyanates, IPDI, the isocyanic acid of hexa-methylene two Ester, two ring ethyl methane diisocyanate XDIs, cyclohexanedimethyleterephthalate diisocyanate, methyl ring One or more in hexyl diisocyanate；Amino End Group PPOX ether is molecular weight Mn=230~5000, and degree of functionality is One or more in 2 polyetheramine.
5. the transparent non yellowing polyurethane sealant of a kind of one-component according to claim 2, it is characterised in that：The fat Race's glycol be ethylene glycol, propane diols, butanediol, pentanediol, neopentyl glycol, methyl propanediol, hexylene glycol, diglycol, One or more in triethylene-glycol；Aliphatic diamine be hexamethylene diamine, IPD, trimethyl oneself two One or more in amine, dimethyl diamino-dicyclohexyl methane.
6. the transparent non yellowing polyurethane sealant of a kind of one-component according to claim 1, it is characterised in that：The gas phase Silicon is aerosil；Plasticizer be diethyl phthalate, dibutyl phthalate, dioctyl phthalate, Dioctyl adipate, dibutyl adipate, hexamethylene 1,2- dioctyl phthalate diisononyl esters, glycol benzoate, triphenyl phosphate In one or more.
7. the transparent non yellowing polyurethane sealant of a kind of one-component according to claim 1, it is characterised in that：It is described latent solid Agent is the one or more in ALT-101, ALT-102, ALT-201, ALT-401, ALT-402, ALT-403；Catalyst is In triethylenediamine, double (dimethylaminoethyl) ethers, dibutyl tin laurate, stannous octoate, zinc Isoocatanoate, isooctyl acid bismuth One or more.
8. a kind of a kind of preparation method of the transparent non yellowing polyurethane sealant of one-component as claimed in claim 1, including：
(1) plasticizer, gas-phase silicon, latent curing agent will be added in allophanate polyurethane prepolymer, stirred under vacuum Scattered 0.5~2h, and control temperature to be less than 50 DEG C；
(2) after the completion of stirring, catalyst, then 0.5~2h of dispersed with stirring under vacuum is added, one-component is produced transparent not Yellow stain polyurethane fluid sealant.
9. a kind of preparation method of the transparent non yellowing polyurethane sealant of one-component according to claim 8, its feature exists In：The preparation of the allophanate polyurethane prepolymer is specially：By Amino End Group PPOX ether, aliphatic diol or two Amine blends are carried out after being well mixed, and are added drop-wise in non yellowing isocyanates, and continue stirring, and inside is passed through N2Protection, it is outside Cooled with frozen water, keep internal reaction temperature to be not higher than 50 DEG C, continue 0.5~2h of stirring reaction after being added dropwise to complete, reaction is completed After test NCO content, allophanate prepolymer is produced after NCO content is qualified.
10. a kind of preparation method of the transparent non yellowing polyurethane sealant of one-component according to claim 9, its feature exists In：The qualified NCO content is that NCO content is 2~10%.
CN201710295537.9A 2017-04-28 2017-04-28 Single-component transparent non-yellowing polyurethane sealant and preparation method thereof Active CN107083228B (en)

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